In stress analysis of petrochemical pipe line, the secondary stress check is the one of basic strength check.
石化管道应力分析中，二次应力的校核是最基本的强度校核之一。
2
Why has the anther chased Yangzi Petrochemical as the analysis case of the administration structure of state-run listed company at first?
为什么选择“石化扬子”作为国有上市公司治理结构的分析案例?。
3
Some failure types of petrochemical equipment are recommended. The failure reasons are analyzed. The emphases of failure analysis from now on are put forward.